NAME

en − 10 Mb/s Ethernet interface

SYNOPSIS

device en0 at iop0 addr ffe250 intr 16

DESCRIPTION

The en interface provides access to a 10 Mb/s Ethernet network. 

The host’s Internet address is specified at boot time with an SIOCSIFADDR ioctl.  The en interface employs the address resolution protocol described in arp(4P) to dynamically map between Internet and Ethernet addresses on the local network.

The interface normally tries to use a “trailer” encapsulation to minimize copying data on input and output.  This may be disabled, on a per-interface basis, by setting the IFF_NOTRAILERS flag with an SIOCSIFFLAGS ioctl. 

DIAGNOSTICS

en%d: can’t initialize.  Can’t initialize the hardware. 

en%d: input error.  The hardware indicated an error in reading a packet off the cable or an illegally sized packet. 

en%d: can’t handle af%d.  The interface was handed a message with addresses formatted in an unsuitable address family; the packet was dropped. 

SEE ALSO

intro(4N), inet(4F), arp(4P)

NEWS-OSRelease 3.3